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package org.graalvm.wasm.benchmark;

import org.graalvm.polyglot.Context;
import org.graalvm.wasm.utils.cases.WasmCase;
import org.openjdk.jmh.annotations.Fork;
import org.openjdk.jmh.annotations.Level;
import org.openjdk.jmh.annotations.Measurement;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.TearDown;
import org.openjdk.jmh.annotations.Warmup;

import java.io.IOException;

/**
 * This benchmark base class runs a workload that compiles the given test case (but does not run
 * it). This is done by calling `Context.evaluate` on each source.
 */
@Warmup(iterations = 2)
@Measurement(iterations = 6)
@Fork(1)
@State(Scope.Benchmark)
public abstract class WasmCompilationBenchmarkSuiteBase {
    public abstract static class WasmCompilationBenchmarkState {
        private Context context;
        private WasmCase benchmarkCase;

        abstract protected String benchmarkResource();

        @Setup(Level.Trial)
        public void setup() throws IOException {
            benchmarkCase = WasmCase.loadBenchmarkCase(benchmarkResource());
        }

        @Setup(Level.Invocation)
        public void setupInvocation() {
            final Context.Builder contextBuilder = Context.newBuilder("wasm");
            contextBuilder.option("wasm.Builtins", "testutil,env:emscripten,wasi_snapshot_preview1");
            context = contextBuilder.build();
        }

        @TearDown(Level.Invocation)
        public void teardownInvocation() {
            context.close();
            context = null;
        }

        public void run() throws IOException, InterruptedException {
            benchmarkCase.getSources().forEach(context::eval);
        }
    }
}
